In a game played at Candlestick Park on a picture-postcard Sunday afternoon, it was Seahawks fans who were serenading the team's fullback as he made his way off the field after an improbable 34-13 victory over the San Francisco 49ers.

Not, however, until Weaver had done a post-game TV interview at midfield and a radio interview as he made his way to the locker room.

The former undrafted tight end from Carson-Newman turned blocking back morphed into the kind of big-play performer that has been missing during the Seahawks' 1-5 start.

Weaver, a square-bodied 242-pounder, took two short passes from backup quarterback Seneca Wallace and turned them in long scoring plays -- a 43-yarder in the third quarter and a 62-yarder in the fourth -- to help the Seahawks snap their three-game losing streak.

This from a player who could not remember the last time he had scored on two such plays. Whose previous long gain in two seasons with the team was a 46-yard reception last year.

Hey, it made as much sense as anything else that happened on this eighth Sunday of the NFL season.

Because the Seahawks were the only team in the NFC West to win, they are tied for second place in the division -- with a 2-5 record.

They put up 34 points, despite the 49ers putting up lopsided advantages in total yards (388-261), rushing yards (124-39) and time of possession (slightly more than 34 minutes to not quite 26).

In the long run, however, the Seahawks just had too many of them.

In addition to Weaver's rambles, cornerback Josh Wilson returned an interception 75 yards for a touchdown, defensive end Patrick Kerney returned a sack-forced fumble by pass-rushing linebacker Julian Peterson 50 yards to setup the first of two field goals by Olindo Mare and Wilson also had a 40-yard kickoff return that preceded the first of Weaver's scores.

"We were able to come up with the big plays," coach Mike Holmgren said. "And that was really the difference."

None were bigger than the two turned in by Weaver.

On the first, he was the primary receiver for Wallace -- who was making his second consecutive start because Matt Hasselbeck remains sidelined with his back/knee situation.

As Weaver looped out of the backfield and ducked inside linebacker Takeo Spikes, Wallace also was moving to avoid the 49ers' blitz. Once Wallace got Weaver the ball, there were no defenders to get in his immediate way.

"I knew the blitz was definitely there and I knew the route was going to be hot," Weaver said. "I did not know the middle of the field was going to be as open as it was."

On the second of his long runs after taking a short pass, Weaver was Wallace's last option. But with Wallace flushed from the pocket and scrambling, and Weaver wide-open along the sideline, it was a pitch-and-catch that had to happen.

"I was scrambling around a little bit, Leonard stayed with his route and I found him," said Wallace, who was sharper against the 49ers (15 of 25 for 222 yards and a 115.8 passer rating) than he was the previous week against the Buccaneers (12 of 23 for 73 yards, 55.2).

Weaver again got a block from Robinson down field that helped him score.

It's not that the 49ers defense wasn't prepared for Weaver.

"Everybody in this league is good, so you shouldn't really sleep on any of them," 49ers linebacker Manny Lawson said. "We knew about Weaver. He's a fullback and he's a brutal back, because he will come and get you to let you know he's there."

As a blocker. "That's one of the things that we were trying to focus on as a defense," Lawson said.

But as a big-play receiver? The smile that Lawson could not suppress was as good as saying, "Not so much."

Not surprising on this day when a wide receiver was blocking for the blocking back.

"That's what it going to take right now," wide receiver Bobby Engram said. "Our motto really was trying to get done by any means necessary today."

As pleased as the Seahawks were, the 49ers were that dissatisfied.

"We are not a charity," fumed Mike Singletary, who became the 49ers head coach a week ago after Mike Nolan was fired. "We cannot give them the game."

Now, back to the standings in the NFC West. The Seahawks are two games behind the division-leading Arizona Cardinals, and play three of their next four games at Qwest Field.

Is this team that looked like it had forgotten how to win poised to go on a run that could get them back into the division race, and playoff berth that goes with winning the title?